开关电源的输入滤波器设计 http://www.powersystems.eetchina.com/ Input Filter Design for Switching Power Supplies Written by Michele Sclocchi Michele.Sclocchi@nsc.com Application Engineer, National Semiconductor The design of a switching power supply has always been considered a kind of magic and art, for all the engineers that design one for the first time. Fortunately, today the market offers different tools that help the designers. National Semiconductor was the first company to offer the “Simple Switcher” software, and an on-line simulation tool that allows the design and simulation of a switching power supply. New ultra-fast MOSFETs and synchronous high switching freq……